High magnetic field ultrasound study of spin freezing in La<sub>1.88</sub>Sr<sub>0.12</sub>CuO<sub>4</sub>

ORAL

Abstract

In the high-Tc cuprate La2−xSrxCuO4 (LSCO), sound velocity and attenuation measurements have recently been shown to be sensitive to the antiferromagnetic (AFM) glass phase [1], a glass-like spin freezing with antiferromagnetic correlations. Here we focus on the case of La1.88Sr0.12CuO4 [2] where this magnetic phase is the most prominent [3]. Our ultrasound data reveal classical signatures of spin freezing that are reinforced up to unexpectedly high magnetic fields. This indicates very strong competition between superconductivity and magnetic freezing, tuned by the magnetic field. Comparison between different acoustic modes points toward a bilinear coupling of B1g strain with the spin fluctuations, which suggest that they have a nematic character.

[1] M. Frachet, I. Vinograd et al., Nature Physics 16, 1064-1068 (2020)
[2] M. Frachet et al., arXiv :2011.00562 (2020)
[3] M. -H. Julien, Physica B 329-333 (2003) 693

*Part of this work was performed at the LNCMI, a member of the European Magnetic Field Laboratory. Work in Grenoble was supported by the Laboratoire d’Excellence LANEF (ANR-10-LABX-51-01) and contract ANR-14-CE05-0007. Work in Toulouse was supported through the EUR grant NanoX nANR-17-EURE-0009. Work in Zürich was supported by the Swiss National Science Foundation.

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Presenters

  • mehdi frachet

    • Laboratoire National des Champs Magnetiques Intenses

Authors

  • mehdi frachet

    • Laboratoire National des Champs Magnetiques Intenses

  • siham benhabib

    • Laboratoire National des Champs Magnétiques Intenses
    • Laboratoire National des Champs Magnetiques Intenses

  • Igor Vinograd

    • University of California, Davis
    • Physics, University of California, Davis
    • Laboratoire National des Champs Magnetiques Intenses

  • Shangfei Wu

    • Department of Physics and Astronomy, Rutgers University
    • Laboratoire National des Champs Magnetiques Intenses

  • baptiste vignolle

    • Institut de Chimie de la Matière Condensée de Bordeaux

  • Hadrien Mayaffre

    • CNRS/GHMFL
    • Laboratoire National des Champs Magnetiques Intenses

  • Steffen Kraemer

    • LNCMI Grenoble
    • Laboratoire National des Champs Magnetiques Intenses

  • Tohru Kurosawa

    • Department of physics, Hokkaido University

  • Naoki Momono

    • Muroran Institute of Technology

  • Migaku Oda

    • Department of physics, Hokkaido University

  • Johan Chang

    • Department of physics, University of Zurich

  • Cyril Proust

    • Laboratoire National des Champs Magnétiques Intenses
    • Laboratoire National des Champs Magnetiques Intenses

  • Marc-Henri Julien

    • CNRS/GHMFL
    • Laboratoire National des Champs Magnetiques Intenses

  • David LeBoeuf

    • CNRS/GHMFL
    • Laboratoire National des Champs Magnetiques Intenses